Combined clutch-operating gear and brake mechanism for revolution stamping-presses



E. VICK.

COMBINED CLUTCH OPERATING GEARAND BRAKE MECHANISM FOR REVOLUTIONSTAMPING PRESSES.

' I APPLICATION FILED APR. 5, 192!- 1,391,923 Patentedse t. 27,1921.

mm (L i3 UNITED STATES:

PATENT, oFFIcE.

ELII-IU VIGK, OF NAILSWOR TI-I, ENGLAI TD.

COMBINED CLUTCH- PERATING GEAR AND BRAKE MECHANISM Fort REVOLUTION,STAMPING-PRESSES. I

Application filed April 5,

To all whom it may concern."

Be it known that I, ELIHU VIoK, a sub ject of His Majesty the King ofGreat Britain and Ireland, residing at Tanners Piece, Nailsworth, in thecounty of Gloucester, England, have invented new and useful Improvementsin Combined Clutch-Operating Gear and Brake Mechanism for RevolutionStamping-Presses, (for which I have filed an application in England,Dec. 3, 1919,) of which the following is a specifi-' cation. 1

This invention has reference to combined clutch operating gear and brakemechanism for the well known revolution type of stamping presses, theobjects of my inventionbeing to provide simple and efiicient meanswhereby on the depression of the pedal by the operators foot, thedriving clutch will be brought into action to start the machine andbring down the stamping top,which, on rising again to its top positionwill be there retained by the ordinary brake, the brake shoe of which isautomatically applied at'the proper time bya part of my invention. Mysaid invention is so designed as to prevent accidents which havehitherto been causedv by a repeated'revolutions of the press withonepressure of the operators' foot on the treadle and also to obtainincreased efficiency of the press owing to quicker contact and releaseof the driving clutch and the positive stop of the press with thestamping top part in its highest position, and moreover whenmy inventionis applied, less effort is required by the operator and thus enabling aweaker man to work the press.

Referring to the drawings Figure 1 is an end elevation, and" Fig. 2 is afront elevation.

The said'well known revolution type of stamping press has two frames 1,2, suitably held together as by transverse cast iron members 3, theseframes carrying the main driving shaft 4 upon which is mounted thedriving clutch usually leather to metal cone type of clutch of which thepart 5 is adapted to revolve freely and to slide on the shaft 1 and isrunning continuously being driven by a band, andthe part 6 is fixed tosaid shaft, and on this driving shaft there is a brake wheel 7 combinedwith a leather lined or other brake shoe 8 and fixed on said shaft thereare 'two eccentrics 9, 10 which directly operate four vertically movableSpecification of Letters Patent. Patented Sept. 27, 1921,

1921. Serial No. 458,692.

guide rods 12 which are firmly bolted to and support the massive castiron stamping member 13 known as the stamping top. In this type of pressthe stamping top 13 descends only at the x'villof the operator which iseffected by well known mechanism.

This known mechanism comprises a long wood foot pedal (to be depressedby the operators foot) and this is carried by two foot levers (not shownon my drawing) mounted on the shaft 11 and connected by suitableconnections to outstanding horizon tal arms 14 of the two bell cranklevers pivoted on fulcrum pins 15 carried by the transverse members 3,the upstanding arms 16 of these bell crank levers being connected to'theclutch striking rod 17 adapted for horizontal movements and at one endconnected to the upstanding end of the clutch lever 18 which is mountedon a fixed fulcrum pin 19 and at its lower forked end 20 engages withthe sliding part5 of the clutch so that by depressing the treadle, thissliding part of the clutch is caused to engage with the;part 6 of theclutch and to turn the shaft a so that the eccentrics 9 bring down thestamping top 13. The moment the part 6 of the clutch is engaged andtheother part 5 of the stamping top 13 has descended about threequarters of an inch, the projecting cam 21 which is fixed on one of theguide rods 12 engages with a roller22 which is fixed on the clutchstriking bar 17 1 and the part 5 of the clutch is thus locked againstthe part 6 until the press top 13 has returned again to withinthreequarters of an inch of c the limit of its upward motion, and thenthe ascending cam 21 on the guide rod 12 is disengaged from the roller22 of the clutch striking the rod 17 and allows the half clutch 5to bedrawn out of engagement wit the half clutch 6 which is done by theinternal coiled wire spring 23 which is'provided between the two parts 5and 6 of the clutch and then the brake shoe 8 is rapidly applied to thebrake drum 7 by means of two powerfultension springs (not shown on mydrawings) and which apply the brake shoe tothe brake'drum 7 so as tokill the momentum of the slowly ascending stamping top 13 which isthereby brought to rest. The said tension springs are connected to thesaid foot levers which are mountedon the shaft 11 on which latter thereis a short outstanding arm 24; which acts against a screw 25 on theouter end of the bracket part 8 of the brake shoe 8 which is mounted ona stationary fulcrum 26. The springs which raise the treadle and applythe brake having a pull of 150 to 200 lbs. so as to apply the brake shoe8 quickly and with sufficient force on the brake drum 7 This pull of thesprings has to be overcome by the pressure of the operators foot everytime the press is worked which is perhaps several hundred times everyworking hour and thus entails considerable fatigue which however iseliminated by my invention, as said tension springs are discarded.

According to my invention the combined clutch operating gear and brakemechanism for said revolution stamping press is arranged as follows z- Ais a transverse timber foot pedal which is fixed to two foot levers Bwhich are keyed on the foot pedal shaft C which is carried in two footpedal shaft bearing stands D fixed on the shop floor, and each of theseshaft bearing stands D carries by the lug e a stop rod 6 and compressionspring E, which latter acts under the foot lever B so as to lift thesame against the nut e? on the rod 6 which nut 6 thus forms anadjustable stop to limit the upward turning movement of the pedal shaftG and parts fixed thereon. Fixed on the pedal shaft C there is anupwardly projecting rocking arm E which at its upper end carries thetripping catch lever G which has a downwardly projecting tooth g on itslower side which is adapted to engage with the upwardly projecting toothj formed on the top of the main catch lever J which is made with alaterally projecting tooth j which is adapted to engage with the tooth hformed on the eccentric arm H, the eccentric straps of which are mountedon the eccentric 7&2 which is fixed on the main driving shaft 4:. Themain catch lever J is jointed on the end of the auxiliary brake lever Kwhich is fixed on the existing brake shaft 11, and fixed on this shaft11 there are also the two brake levers L which replace the existing footlevers and tension springs. Jointed to the ends of these two brakelevers L, there are two upstanding connecting rods M, the upper ends ofwhich pass up through holes in two links m which at their top ends arejointed to the existing clutch operating levers 14. Each connecting rodM has a nut m on its top end to bear on the link m and thus make thecombined connecting rod and link rigid in tension but collapsible incompression by the connecting rod sliding up through the hole in thelink m against the pressure of a coiled wire spring m which is mountedon the connecting rod M and acts between the underside of the link m andthe washer and nut m on the connecting rod M.

The operation of my inventiun is as follows :-Assuming the parts are inthe positions shown by my drawings with the stamping top 13 stationaryand in its highest position and the main shaft 1 also stationary withthe part 5 of the clutch revolving thereon and driven by a hand, thenwhen the operator depresses the pedal A, this causes the tripping pawl Gto pull the catch pawl J clear of the lateral projection on theeccentric arm H so that the catch pawl J with the brake lever K andlevers L and rods M now fall by gravity, thereby depressing the levers14 and moving the clutch bar 17 toward the right hand in Fig.1 andpressing the part 5 of the clutch against the part 6, so that the mainshaft 4 with the eccentrics instantly commence to revolve and thestamping top 13 descends and at the same time the eccentric arm Hdescends and passes the pawl of the catch lever J and on the upwardstroke the lateral projection 72 of the eccentric arm H engages thecatch pawl J and raises the same with the brake lever K turning theshaft 11 and causing the arm 24 to turn upwardly and to bear against thescrew425 andinstantly apply the brake shoe 8 to the brake wheel 7,thereby bringing the stamping top to rest again in its highest position.The eccentric 7L is made adjustable on the main shaft so that itsangularposition and that of the eccentric armcan be advanced to any requiredangle in respect of the two eccentrics 9, 10, of the press and thus thebrake 8 can be applied at the desired moment which 'makesit practicallyimpossible for the press to run on. The connections from the levers L tothe levers 1 1 are purposely made rigid in tension and collapsible incompression so that the part of the clutch 5 is instantly put into gearwith the part- 6 immediately the catch lever J is released, but by thecombined rods M and springs m being collapsible in compression any unduestrain on the roller 22 and the cam 21 is avoided whichotherwise mighttake place owing to the fact that the rods M commence their upwardmovement before the cam 21 is due to disengage the roller 22; a furthergreat advantage obtainedby the compression springs m is that they movethe clutch striking fork 18 rapidly forward immediately the roller22 hasbeen released by the cam 21 so that the part 5, of the clutchis at theproper moment instantly moved out of ear with the part 6 of the clutchto bring the stamping top 13 to rest in its top position as aforesaid. Atension spring j connects the catch lever J to the lever K so as to keepthe catch end 7' properly in engagement with the tooth h of theeccentric rod H.

hat I claim as my, invention and desire to secure by Letters Patentis 1. In a stamping press the combination of a stamping top, a maindriving shaft,

means carried by said driving shaft to re ciprocate said stamping top, aclutch upon said driving shaft, a pedal lever, a pair of interconnectedlevers associated with said pedal lever, means connecting said leversthe clutch to disengage, a brake associated with the driving shaft andmeans associated with, saidlevers to apply said brake when the leversare returned to their normalposition. I

2. In a stamping press the combination of, a stamping top, a maindriving shaft, means carried by said drivingjshaft to reciprocate saidstamping top, a clutch upon said. driving shaft,apedal lever, a pair ofinterconnected levers, means for supporting the said levers, meansassociated with said pedal to trip said supporting means, meansconnecting saidlevers and said clutch, which means positively operate inone direction but allow relative movement in the other, whereby theclutch is operated to drive the shaft and to reciprocate the stampingtop, means'carried by said driving'shaft to re turn the said supportingmeans and pedal into its normal condition and allow the clutch todisengage,a brake associated with the driving shaft and means associatedwith said levers to apply said brake when the levers are returned totheir normal position.

3. In a stamping press the combination of, a stamping to-p,a maindriving shaft, means carried by said driving shaft to reciprocatesaidstamping top, a clutch upon said driving'shaft, a pedal lever, apair of interconnected levers, a catch lever adapted to support saidlevers, a trip lever car-.

ried by said pedal to trip said catch lever, means connecting saidlevers and said clutch, which means positively operate in one directionbut allow relative movement in the other, whereby the clutch is operatedto means carried by said driving shaft to reoiprocate said stamping top,a clutch upon said driving shaft, a pedal lever, a pair ofinterconnected levers associated with said pedal lever, rod mounted uponone of said. levers, a plate member assoclated wlth said clutch andhaving a hole for the said rod, an abutmentcarried by said rod adjacentto one side of said plate and a spring carried by the rod an oppositeface to cause the rod to act positively in one direction but allowrelative movement in the other direction, whereby the clutch is operatedto drive the'shaft andreciprocate the stamp 'ing top, means carried bysaid driving shaft to return said pedal and lever to its normal positionand allow the clutch to disengage, a brake associated with the drivingshaft and means associated wlth said levers'to apply SillQl-bI'ELkG whenthe levers are returned to their normal position.

I 5; Ina stamping press the combination of, a stampln g top, a maindrlvlng shaft,

means carried by saiddrivingshaft to re-.

ciprocate said stamping top, a clutch upon said driving shaft, a pedallever, a pair of interconnected levers, means for supporting the saidlevers, means associated with said pedal totrip-said supporting means,

a 'rod mounted upon-one of said levers, a 7 plate member associated withsaid clutch and'having a hole for the said rod, an abutment. carriedbysaid rod adjacent to one sideof saidp'late and a spring carried by therod, an opposite face tocause the rod to act positively in one directionbut allow relative movement in the other direction,

vwhereby the clutch is operated to drivethe shaft and reciprocate thestampingtop,

means carried by said driving shaft to re- .7

turn said pedal and lover to its normal position and allow the clutch todisengage, a brake associated with the driving shaft and .meansassociated with said levers to apply said brake when the levers arereturned to their normal position.

6. In a stamping press the combination of, a stamping-top, a maindriving shaft, means carried by said driving shaft toreciprocatesaid'stamping top, a; clutch upon said driving shaft, a pedallever, a pair of interconnected levers, a catch lever adapted .tosupport said levers, a trip lever carried by'said pedal to tripsaid-catch lever, a rod mounted upon one of said levers, a platemember'associated with said clutch and having a hole for the said rod,an abutment carried by said rod adjacent to one side of said 'plate anda spring carried by the rod, an opposite face to causethe rod to actpositively in one direction but allow relatlve movement inthe otherdirection, whereby the clutch is operated to drive the shaft andreciprocate the stamping top, means carried by said driving shaft 'toreturn said pedal and lever to its normal position and allow the clutchto disengage, a brake associated with the'driving shaft and meansassociated with said levers to a )ply said brake when the levers arereturneitl to their normal position.

'7. In a stamping press, the combination of, a stamping top, amaindriving shaft, means carried by said driving shaft to reciprocatesaid stamping top, a clutch upon said driving shaft, a pedal lever, apair of interconnected levers, a catch lever adapted to support saidlevers, a trip lever carried by said pedal to trip said catch lever,means connecting said levers and said clutch, which means positivelyoperate in one direction but allow relative movement in the other,whereby the clutch is operated to drive the shaft and to reciprocatethe. stamping top, a projection carried by said driving shaft adapted toengage with and move the catch lever together with the pedal andinterconnected levers into its normal position and allow the clutch todisengage, a break associated with the driving shaft and means associated with said levers to apply said brake when the levers arereturned to their normal position. i

8. ln clutch and brake operating mechanism for stamping presses thecombination of a pedal lever, a pair of interconnected levers associatedwith said pedal lever, means for connecting said levers with the drivingclutch, which means positively operate in one direction but allowrelative movement .inthe opposite direction, means operated bythedriving shaft to return said pedal and levers to their normal positionand allow the clutch to disengage, and means associated with said leversto apply the brakewhen the levers are returned to their normal position.

9. In clutch and brake operating mechanism for stamping presses thecombination of, a pedal lever, a pair of interconnected levers, meansfor supportingthe said levers, means associated with said pedal to tripsaid supporting means, means for connecting said levers with the drivingclutch, which means positively operate in one CllI8C-- tion but allowrelative movement in the op posite direction, means operated by the driving shaftto return said pedal and levers to their normal position andallow the clutch to disengage, and means associated with said levers toapply the brake when the levers are returned to their normal position.

10. In clutch and brake operating mecha nism for stamping presses thecombination of a pedal lover, a pair of interconnected levers, a catchlever adapted to support said levers, a trip lever carried by said pedalto trip said catch lever, means for connecting said levers with thedriving clutch, which means positively operate in one direction butallow relative movement in the opposite direction, means operated by thedriving shaft to return said pedal and levers to their normal positionand allow the clutch to disengage, and means associated with said leversto apply the brake when thelevers are returned to their normal position.

ll. In clutch and brake operating mechanism for stamping presses thecombination of a pedal lever, a pair of interconnected levers, a rodmounted upon one of said levers, a plate member associated with saidclutch and having a hol for the said rod, an abutment carried by saidrod adjacent to one side of said plate and a spring carried by the rod,an opposite face to cause the rod to act positively in one direction butallow relative movement in the other direction, whereby the clutch isoperated to drive the shaft and reciprocate the stamping top, meansoperated by the driving shaft to return said pedal and levers to theirnormal position and allow the clutch to disengage, and means associatedwith said levers to apply the brake when the levers are returned totheir normal position.

12. In clutch and brakel opera-ting mechanism for stamping presses thecombination of a pedal' lever, a'pair of interconnected levers, a rodmounted upon one of said levers, a plate member associated with saidclutch and having a hole for the said rod, an-abutment carried by saidrodiadjacent to one side of'said plate and a spring carried by the rodan opposite face to cause the rod to act positively in one direction butallow relative movement in the other direction, whereby the clutch isoperated to drive the shaft and reciprocate: the stamping top, means forsupporting the said levers, means associated with said pedal; to tripsaid supporting means, means operated by the driving shaft to returnsaid pedal and levers to their normal position and allow the clutch todisengage, and means associated with said levers to apply the brake whenthe levers are re- "urned to their normal positlon.

13. In clutch and brake operating mechanism for stamping presses thecombination of a pedallever, av pair of interconnected levers, a rodmounted upon one of sa d levers, a plate member associated with saidclutch and having a hole for the said rod,

an abutment carriedby said rod adjacent to one side of saidplate and aspring carried by the rod, an opposite face to cause the rod .to actpositively in one direction but allow realtive movement in the otherdirection whereby the clutch is operated to drive the shaft andreciprocate the stamping top, a catch lever adapted to support saidlevers,

a trip lever carried by said pedal to trip said catch lever, meansoperated by the driving shaft to return said pedal and levers to theirnormal position and allow the clutch to disengage, and means associatedwith said levers to apply the brake when the levers are returned totheir normal position.

,In testimony whereof I have signed my name to this specification.

ELIHU vioK.

